feat: Allow optional patch version in SDK feature versions

[jsonbailey]

Summary

Updates the SDKVersion JSON schema pattern to allow an optional patch version component. This enables SDK metadata files to specify feature introduction versions with patch precision (e.g., "2.3.1") in addition to the existing major.minor format (e.g., "2.3").

Before: ^[0-9]+\.[0-9]+$ (only "X.Y")
After: ^[0-9]+\.[0-9]+(\.[0-9]+)?$ (allows "X.Y" or "X.Y.Z")

This change is backward compatible - existing major.minor versions continue to validate.

Review & Testing Checklist for Human

• Verify the regex pattern ^[0-9]+\.[0-9]+(\.[0-9]+)?$ correctly matches intended formats:
  • Should match: "2.3", "5.4", "2.3.1", "10.20.30"
  • Should NOT match: "2", "2.3.1.4", "v2.3", "2.3."
• Confirm no downstream consumers of this schema expect strictly major.minor format

Notes

This change was requested to support the Ruby Server SDK which has features introduced at specific patch versions (e.g., storingDataRedis at 2.3.1).

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Requested by: @jsonbailey
Link to Devin run: https://app.devin.ai/sessions/49b44fe704ac4382802b7b3dc07970a6

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